Light source device and projector

摘要

A light source device includes a plurality of light emitting devices connected in series, an open-circuit failure detecting section, a failure detection and maintenance section, and a short-circuiting section connected in parallel to at least one light emitting device among the plurality of light emitting devices. The open-circuit failure detecting section detects an open-circuit failure of the light emitting device connected in parallel. The failure detection and maintenance section shifts to, when the open-circuit failure detecting section detects the open-circuit failure, a circuit state during the open-circuit failure and maintains the circuit state to which the failure detection and maintenance section shifts. The short-circuiting section short-circuits, when the failure detection and maintenance section maintains the circuit state during the open-circuit failure, both ends of the light emitting device in which the open-circuit failure is detected.

主权项

1. A light source device comprising:
a plurality of light emitting devices connected in series; and a plurality of protection circuits individually connected to each of the plurality of light emitting devices, each protection circuit being connected to a corresponding light emitting device that is one of the plurality of light emitting devices, each protection circuit comprising:
an open-circuit failure detecting section connected in parallel to the corresponding light emitting device, the open-circuit failure detecting section detecting an open-circuit failure of the corresponding light emitting device;a failure detection and maintenance section connected in parallel to the corresponding light emitting device, the failure detection and maintenance section shifting to and maintaining a circuit state when an open-circuit failure is detected for the corresponding light emitting device; anda short-circuiting section connected in parallel to the corresponding light emitting device, the short-circuiting section short-circuiting both ends of the corresponding light emitting device when the failure detection and maintenance section maintains the circuit state.